SNLS477B October 2014 – November 2018 DS90UB948-Q1
When designing the transmission channel, consider the total insertion loss of all components in the signal path between a serializer and a deserializer. An example of the transmission channel connects from a FPD-Link serializer (SER) to a deserializer would consist of a serializer PCB, two or more connectors, one or more cables, and a deserializer PCB as shown in Figure 22
Table 6 depicts the maximum attenuation using DS90UB948-Q1. The PCLK is the maximum frequency based on the channel attenuation. The attenuation increases with cable length and frequency. The trace length of the PCB has very small contribution to the differential insertion loss of the transmission channel. Table 6 shows the maximum attenuation that the AEQ can compensate for at the given PCLK and resultant Nuyquist frequency.
|PCLK (MHz)||FPD-LINK LINE RATE (Gbps)||NYQUIST FREQUENCY (GHz)||CHANNEL ATTENUATION (dB)||TYP CABLE LENGTH (m)|